Search found 1130 matches

by p_zetner
Tue Oct 20, 2020 2:14 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - Any Interest
Replies: 52
Views: 866

Re: Zoom Meeting - Any Interest

I’d be interested in participating. Don’t have Zoom installed yet but my wife has some experience with it. The date and time are convenient so please keep me in the loop.
Cheers.
Peter
by p_zetner
Tue Oct 13, 2020 12:52 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Magnetometry-summary data for August/September
Replies: 3
Views: 148

Re: Magnetometry-summary data for August/September

Nice summaries, Stu.
Thanks for continuing to post these.
Cheers.
Peter
by p_zetner
Tue Sep 29, 2020 12:38 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Advice requested on Quantum filter purchase
Replies: 11
Views: 327

Re: Advice requested on Quantum filter purchase

Hi Lou.
I do all of my H-alpha imaging with a Daystar Quantum PE 0.6A filter.
Here are some recent images (including proms) under conditions of good seeing.
viewtopic.php?f=4&t=29045&p=265306#p265306
Cheers.
Peter
by p_zetner
Sat Aug 22, 2020 1:09 pm
Forum: This is SolarChat !!
Topic: Thank You, SolarChat
Replies: 14
Views: 403

Re: Thank You, SolarChat

Great work, Alfred.
Thanks for sharing this.
What is the age group of your students?
Cheers.
Peter
by p_zetner
Tue Aug 18, 2020 7:35 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Replies: 7
Views: 333

Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four

Thanks Alexandra and Raf. Alexandra: My feeling is that the Aluminum line (I'm assuming the one at 3961.5 angstroms) would give an image very similar to a Ca H or K image taken in the line wings or taken with broader spectral linewidth (a Baader K-line filter for example). I haven't taken the time t...
by p_zetner
Mon Aug 17, 2020 7:18 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Replies: 7
Views: 333

Re: August 3, 2020 Spectroheliograms: the Fraunhofer Four

Thought I would add these images which include the prominences. The H alpha and Ca K images show inverted disks with proms while the HeD3 image shows the normal disk with proms. Cheers. Peter 03Aug 2020 H-alpha montage with proms.png 03Aug 2020 CaK montage with proms.png 03Aug 2020 HeD3 montage with...
by p_zetner
Mon Aug 17, 2020 3:30 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: August 3, 2020 Spectroheliograms: the Fraunhofer Four
Replies: 7
Views: 333

August 3, 2020 Spectroheliograms: the Fraunhofer Four

Hi Everyone. Slowly working through the processing of my August 3 spectroheliograms. Here is a montage of the Sun as it appears (very differently) in four of the Fraunhofer lines. AR12768 offered a great opportunity to view the extensive plage in the four different lights. Cheers. Peter. (Ooops! I n...
by p_zetner
Mon Aug 17, 2020 3:26 pm
Forum: This is SolarChat !!
Topic: CaK and Ha with a T250
Replies: 12
Views: 348

Re: CaK and Ha with a T250

Beautiful images, Alex.
They may suffer from the effects of poor seeing but the H alpha glows!
Cheers.
Peter
by p_zetner
Mon Aug 17, 2020 12:20 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Perseid Meteor Detection by Radio
Replies: 99
Views: 1920

Re: Perseid Meteor Detection by Radio

Brilliant stuff, Stu! I have the same question as Alexandra. Why not plot the count rate itself as opposed to accumulated counts? I’m setting up a system myself to measure solar radio activity in the 30 to 50 MHz band. I’m hoping to do spectral analysis on bursts when the Sun becomes more active. Ho...
by p_zetner
Fri Aug 14, 2020 3:06 pm
Forum: This is SolarChat !!
Topic: Limb Spicules & Prom, our Fuzzy Star! | HA | Aug 13th 2020
Replies: 11
Views: 336

Re: Limb Spicules & Prom, our Fuzzy Star! | HA | Aug 13th 2020

These are beautiful shots of the limb, Marty.
I also hope you and Valery can resolve your issues.
Cheers.
Peter
by p_zetner
Fri Aug 14, 2020 3:04 pm
Forum: This is SolarChat !!
Topic: My first solar scope (150 F/8 unaluminized reflector)
Replies: 29
Views: 720

Re: My first solar scope (150 F/8 unaluminized reflector)

A great collection of scopes, Pedro.
Almost time to start a telescope museum!
Cheers.
Peter
by p_zetner
Fri Aug 14, 2020 3:03 pm
Forum: Sunlit Earth
Topic: Sunset on the Mountain
Replies: 7
Views: 276

Re: Sunset on the Mountain

Beautiful photos of some spectacular scenery, Derek.
Thanks for posting these.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 11:59 pm
Forum: This is SolarChat !!
Topic: AR12770 at last
Replies: 9
Views: 226

Re: AR12770 at last

Lovely capture and beautiful, subtle processing.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 11:57 pm
Forum: This is SolarChat !!
Topic: Sol from the 11th of August 2020.
Replies: 10
Views: 200

Re: Sol from the 11th of August 2020.

A fine series, Eric.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 11:56 pm
Forum: This is SolarChat !!
Topic: More images from 12th Aug '20
Replies: 12
Views: 272

Re: More images from 12th Aug '20

Great images, Stu.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 11:56 pm
Forum: This is SolarChat !!
Topic: Full disk 13-08-2020
Replies: 8
Views: 218

Re: Full disk 13-08-2020

Spectacular details in that disk, Rainer.
The filaprom is a great capture.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 11:54 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20200813) | lots of PROMS
Replies: 11
Views: 352

Re: Today's SUN (20200813) | lots of PROMS

Beautiful series, Pedro.
Gorgeous prom captures.
Cheers.
Peter
by p_zetner
Thu Aug 13, 2020 9:19 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: Weak CME impact 13th July 2020
Replies: 9
Views: 602

Re: Weak CME impact 13th July 2020

Hi Stu. The attached image summarizes my attempt at Fourier analyzing the magnetometer data. FFT_Montage_v2.png Panel (a) shows the raw magnetometer data that you sent me along with a smoothed version (7000 point Savitzky-Golay). The horizontal scale is measured in seconds with t=0 corresponding to ...
by p_zetner
Tue Aug 11, 2020 11:40 pm
Forum: This is SolarChat !!
Topic: August 10, 2020: AR12770 in H-alpha
Replies: 11
Views: 252

Re: August 10, 2020: AR12770 in H-alpha

Thank you all for your comments. Terry: I was lucky enough to salvage some details in the spot umbra at f/46 even though the surrounding plage regions are not too sharp. You're right, there is a lot of action there! Franco: I prefer the wider field version as well. The seeing didn't quite support th...
by p_zetner
Tue Aug 11, 2020 3:38 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: August 3, 2020: Calcium Trio
Replies: 9
Views: 402

Re: August 3, 2020: Calcium Trio

Hi John. I used a single Dynasil / Optometrics 1800 groove, 25x50mm, holographic, UV blazed grating. The curve is attached to this post. I should also mention that I used a bandpass filter (Edmund Optics 850nm CWL, 10nm FWHM) to block a second order spectrum. Without the filter in place, the image c...
by p_zetner
Tue Aug 11, 2020 3:28 pm
Forum: This is SolarChat !!
Topic: AR12770 in H-a August 10 2020 with 305mm telescope and QUARK.
Replies: 15
Views: 397

Re: AR12770 in H-a August 10 2020 with 305mm telescope and QUARK.

A beautiful image, Valery.
You still pulled out a wonderful result, despite the seeing.
Cheers.
Peter
by p_zetner
Tue Aug 11, 2020 3:28 pm
Forum: SPoD Archive
Topic: AR12770 in H-a August 10 2020 with 305mm telescope and QUARK.
Replies: 8
Views: 155

Re: AR12770 in H-a August 10 2020 with 305mm telescope and QUARK.

A beautiful image, Valery.
You still pulled out a wonderful result, despite the seeing.
Cheers.
Peter
by p_zetner
Tue Aug 11, 2020 3:23 pm
Forum: This is SolarChat !!
Topic: August 10, 2020: AR12770 in H-alpha
Replies: 11
Views: 252

August 10, 2020: AR12770 in H-alpha

Hello Everyone. Seeing was pretty bad on the 10th so these images suffer a bit of blurriness but at least it wasn't a total wash like my August 8th session. Equipment: Aries ERF, Celestron C8 Edge, Moonlite CHL focuser, f/46 Telecentric, Daystar QPE 0.6A, (f/30 FR) Point Grey USB3 Grasshopper IMX174...
by p_zetner
Tue Aug 11, 2020 3:08 pm
Forum: This is SolarChat !!
Topic: Sunday afternoon gap 9th August 2020
Replies: 15
Views: 281

Re: Sunday afternoon gap 9th August 2020

Beautiful work, Alexandra.
The off band images really do have a beauty of their own.
Cheers.
Peter
by p_zetner
Sat Aug 08, 2020 4:36 pm
Forum: This is SolarChat !!
Topic: Ca K images taken on Aug 7 with the 300 mm Newtonian
Replies: 15
Views: 328

Re: Ca K images taken on Aug 7 with the 300 mm Newtonian

WOW! These are just stunning, Christian.
Spectacular CaK imaging.
Cheers.
Peter